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  2. Elasticity of a function - Wikipedia

    en.wikipedia.org/wiki/Elasticity_of_a_function

    An example of semi-elasticity is modified duration in bond trading. The opposite definition is sometimes used in the literature. That is, the term "semi-elasticity" is also sometimes used for the change (not percentage-wise) in f(x) in terms of a percentage change in x [9] which would be

  3. The Cold Equations - Wikipedia

    en.wikipedia.org/wiki/The_Cold_Equations

    The Encyclopedia of Science Fiction points to A Plunge into Space (Robert Cromie, 1890) [9] as having a subplot very similar to "The Cold Equations". [10] " A Weighty Decision" ( Al Feldstein in Weird Science , 1952) [ 11 ] and the story "Precedent" ( E. C. Tubb in New Worlds , 1952) [ 12 ] also have been cited as potential inspirations.

  4. Elasticity - Wikipedia

    en.wikipedia.org/wiki/Elasticity

    Elasticity (economics), a general term for a ratio of change. For more specific economic forms of elasticity, see: Cross elasticity of demand; Elasticity of substitution; Frisch elasticity of labor supply; Income elasticity of demand; Output elasticity; Price elasticity of demand; Price elasticity of supply; Yield elasticity of bond value

  5. Biharmonic equation - Wikipedia

    en.wikipedia.org/wiki/Biharmonic_equation

    In mathematics, the biharmonic equation is a fourth-order partial differential equation which arises in areas of continuum mechanics, including linear elasticity theory and the solution of Stokes flows. Specifically, it is used in the modeling of thin structures that react elastically to external forces.

  6. Linear elasticity - Wikipedia

    en.wikipedia.org/wiki/Linear_elasticity

    Expressed in terms of components with respect to a rectangular Cartesian coordinate system, the governing equations of linear elasticity are: [1]. Equation of motion: , + = where the (), subscript is a shorthand for () / and indicates /, = is the Cauchy stress tensor, is the body force density, is the mass density, and is the displacement.

  7. Elasticity tensor - Wikipedia

    en.wikipedia.org/wiki/Elasticity_tensor

    The elasticity tensor is a fourth-rank tensor describing the stress-strain relation in a linear elastic material. [ 1 ] [ 2 ] Other names are elastic modulus tensor and stiffness tensor . Common symbols include C {\displaystyle \mathbf {C} } and Y {\displaystyle \mathbf {Y} } .

  8. ‘Marguerite’s Theorem’ Review: A Bizarrely By-the-Numbers ...

    www.aol.com/entertainment/marguerite-theorem...

    It is a paradox worthy of Zeno himself that significant dumbing-down is necessary in order to make tales of extraordinary genius comprehensible to us lay audiences. But in her own attempt at ...

  9. Compatibility (mechanics) - Wikipedia

    en.wikipedia.org/wiki/Compatibility_(mechanics)

    The compatibility conditions in linear elasticity are obtained by observing that there are six strain-displacement relations that are functions of only three unknown displacements. This suggests that the three displacements may be removed from the system of equations without loss of information.